While NOT like the winters I grew up with in North Dakota, the past weekend was stingingly cold in Colorado. Records were broken in Greeley with minus 25 degrees Sunday. So for all intents and purposes we've already HAD some winter, but officially
it gets under way December 21st. Winter Solstice marks the fewest hours of daylight
for the year when the North Pole is at its farthest from the sun during its yearly orbit around it.

The longest night of the year signals celebrations and observations around the world including Blue Christmas. The earliest winter solstice celebrations included Christmas trees that had a special meaning for people in the winter.

Winter solstice 2016 in Northern Hemisphere will be at 3:44 AM on Wednesday, December 21.